Cementing machine



P 8, 1931- i J. w. COSGROVE 822,014

' CEMENTING- MACHINE Filed May is, 1928 A? Fig. 1.

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Patented Sept. 8, 1931 UNITED STATES PATENT OFFICE JOHN W. COSGROVE,DECEASED, LATE OE MEDFORD, MASSACHUSETTS, BY CAROLINE E. COSGROVE,ADMINISTRATRIX, OF MEDFORD, MASSACHUSETTS, ASSIGNOR TO UNITED SHOEMACHINERY CORPORATION, OF PATERSON, NEW JERSEY, A. CORPORATION OF NEWJERSEY CEMENTING MACHINE Application filed May 15, 1928. Serial No.277,917.

This invention relates to cementing machines and is illustrated asembodied in a cementing machine of the type disclosed in Letters Patentof the United States No. 1,315,948,

granted September 16, 1919, upon application of John W. Cosgrove, forCoating simultaneously opposite surfaces of pieces of work.

On account of the edges of certain fabric parts of rubber shoes beingexposed, both the appearance and utility of the product may be impairedbecause such exposed edges may be frayed by slight wear weakening thegrip of the stitching, particularly if it is too near the edge of thework. The edges may also be unsightly if of different color than thefaces, which is often the case if the dyes applied to the surface of thefabric are not obsorbed by the mid portion. An application of cement tosuch edges tends to make them more like the faces in color and alsolessens the likelihood of fraying since the loose thread ends arebound'to the body of the fabric by the cement. Therefore, an object ofthe invention is to provide improved cementapplying apparatus forcoating simultaneously not only a marginal face of a piece of work butalso the edge adjacent thereto. To this end, in the illustratedembodiment of the invention, cooperating applying rolls havingcement-retaining teeth have been provided with alined cement-retaininggrooves deeper than the teeth are high and constructed and arrangedprogressively to coat the edge of a piece of work without pressure bypartial immersion in the annuli of cement in the grooves as the work isfed between the rolls with the edge to be coated in alinement with thegrooves, the toothed parts of the rolls applying cement to the marginsof the worksimultaneously with its application to the edge as it passesthrough the accumulation.

The cement held in a groove of an applying roll tends to conform to thecontour of the groove, shrinking away from that position which it mustoccupy to fill the groove completely. Since the alined grooves in theapplying rolls should be well filled with cement to insure properlycoating the edge of the work, improved means have been provided wherebycement is collected from the faces of the applying rolls and theresulting accumulations are directed to and deposited in the alinedgrooves. To this end, the peripheries of the illustrated applying rollshave been provided with teeth arranged in transverse and helicallyconverging rows, the latter rows being oppositely inclined at theopposite sides of the grooves. The inclined teeth, in cooperation withscrapers in juxtaposition thereto, are constructed and ar ranged toassist in providing an accumulation of cement of restricted width in thegrooves around the peripheries of the rolls.

In a machine employing a rotatable feed roll to supply cement to acooperating applying roll, the feed roll carries to the applying roll anexcess of cement which collects in the wedge-shaped space between themand at the side of the feed roll at which fresh cement is raised fromthe tank. There is a tendency in such machines for lumps of lint orcoagulated cement held in the excess of cement between the rolls to wipethe applying roll relatively clean of cement in a band of the same widthas that of the lumps. When the work requires the application of arelatively nar row band of cement, if the roll is cleaned at thatportion which normally applies cement to the work, such a wiping actionreferred to above will render the machine inoperative for its intendedpurpose since the roll is devoid of cement in that area which isintended to apply cement to the work. Accordingly, another object ofthis invention is to obvlate this difficulty by providing an improvedform of feed member. To this end, the illustrated feed roll is toothedobliquely, said roll being positioned with its periphery injuxtaposition to that of the lower applying roll, thereby gradually totransfer the excess of cement and the accumulations of lint or lumps ofcoagulated cement therein to one 7 side of the tank by the lateralwiping tendency of the obliquely disposed teeth of the feed roll.

Referring to the accompanying drawings, Fig. 1 is a side elevation of apart of a machine embodying the invention in a preferred form with someparts broken away to show the lower roll and its drive mechanism;

Fig. 2 is an enlarged side elevation, with parts in section, showing therolls in detail;

Fig. 3 is a reduced end elevation of the machine shown in Fig. 1, butwith parts removed and broken away;

Fig. 4 is a perspective view of a str1p of work after having been coatedwith cement; and

Fig. 5 is a section along the line V-V of Fig. 2, illustrating thecohesive action of the cement at the point of tangency of the work tothe rolls.

As stated above, the illustrated cementing machine is of the type setforth in Letters Patent No. 1,315,948, to which Letters Patent referencemay be had for detailed illustration and description of the constructlonand operation of parts not fully illustrated and described herein. As inthe machine disclosed in said Letters Patent, the illustrated machinehas an overhanging, horizontal arm 6 (Fig. 1) extending from the upperportion of a frame 8, carrying a cement reser- Voir 10 above. The arm 6,centrally thereof, supports a rotatable main drive shaft 12 which may bedriven by any suitable means and which carries an upper cement-applyingroll 14. The reservoir 10 is clamped to the arm 6 by a wing nut and bolt16 at either side of the reservoir. The passage of cement by gravityfrom the reservoir to the roll is controlled by movement of a -valve 18and horizontally slidable gates 20 and 22 (Fig. 3) the latter gate beingreadily adjustable by means of a thumbscrew 24 which is journaled in adepending portion 26 of the gate 22 and threaded in the arm 6 as at 28.The rate of flow of cement from the reservoir to the upper applying rollmay be accurately controlled by manipulating the gate 22. A plate 30 isattached by screws 32 to the end of the arm 6 to enclose the upper partof the upper applyin roll and also firmly to hold an abutment plate 34against the upper applying roll, which latter contacts with a rearabutment plate 36 seated in the arm 6. The plate 30 is held in alinementwith the end of the arm 6 by means of a spline and complementary key 38on the plate and arm respectively.

Below the arm 6 and attached to the frame by a pivotal connection (notshown) is an arm 40 having a gear box 42 and a cement tank 44 integraltherewith. A lower cement-applying roll 46 and a feed roll 48 are bothonclosed in the tank 44 and are mounted upon shafts 50 and 52,respectively which are journaled in the gear box 42 in both side wallsthereof. An idler 54 mounted on a shaft 56 meshes with gears 58 and 60which are pinned to the shafts 50 and 52 upon which the lower applyingroll 46 and feed roll 48, respectively, are mounted, so that the drivingof the lower applying roll 46 through its shaft 50, which'is gear drivenfrom shaft 12 as illustrated in the above-mentioned Letters Patent, willimpart to the feed roll the same angular direction of rotation which theapplying roll has in order to produce a wiping action therebetween astheir peripheries pass in proximity and in opposite directions.

In order to aid the lower applying roll 46 in taking up allthe cement itcan hold, it is desirable to accumulate an excess of cement at the lineof proximate tangency 62 (Fig. 3) between the rolls 46 and 48. To thisend the feed roll 48 is rotated in the cement in the tank andcontinuously supplies to the lower applying roll 46 more cement than itcan take up, and the excess cement indicated at 64 collects between therolls in a wedgeshaped mass and extends outwardly from the line ofproximate tangency between the rolls on the side of the feed roll atwhich fresh cement is raised from the tank. In crosssection the teeth ofthe feed roll 48 are substantially the same as those disclosed in theabove-mentioned Letters Patent, but the illustrated teeth are disposedobliquely across the periphery of the roll. By so constructing theteeth, the accumulation of cement indicated at 64 is progressivelyforced to one side by the lateral wiping action of the teeth, andwhatever lumps of coagulated cement or of lint are retained in thecement at the accumulation are removed to one side 68 thereof with thecement that holds them. Hence the lumps can not wipe cement from therolls in a work-engaging area, obviating a difficulty hereinbeforeoutlined. The steady lateral motion of the accumulated excess of cementalso insures a constant and adequate supply of fresh cement beingcarried to the groove 84 in the lower applying roll.

The cement-applying rolls 14 and 46 are each composed of four parts, twoadjacent central segments 7 O and 72, (Fig. 2) and cover-plates 74, 74at the outer sides of each roll, which parts are held assembled by threescrews such as that shown at 76. The coverplates 74 are of the samediameter as that of the rolls, measured between the tips of the teeth,and are fitted tightly to the outer side of the central segments toprevent cement from flowing past the corners over the sides of therolls. The cover-plates also are provided with concentric bosses 78 (Fig2) which fit complementary recesses in the outer sides of the rollsegments 7 O and 72 inorder to aline the cover-plates with the rollsindependently of the screws 76. The central segments 70 and 72 arestudded with work-contacting projections or teeth 80 (Fig. 2) in theform of wedge frusta which are arranged in transversely and helicallydisposed rows separated by grooves equally as deep as the projectionsare high, the rows on one segment being oppositely inclined to those onthe other, for the purpose hereinafter explained,

when the roll is assembled as shown in theillustrated embodiment. Theinner peripheral corners of each segment are recessed as indicated at 82so that when the segments are assembled the adjacent recesses form agroove 84 of rectangular cross-section which separates the rows ofspaced wedge frusta of one inclination from those of the other. Itshould be noted that the diameter of the groove 84 at its base issubstantially less than that of the segment at the base of the teeth,and that its sides 86 constitute cement-retaining surfaclessubstantially normal to the axis of the rol To insure a complete coatingof the edge as well as the adjacent marginal faces 90 on opposite sidesof the work 92, it is desirable that the grooves 84 in the applyingrolls be Well filled with cement. This is accomplished by an actionsomewhat similar to that by which the cement between the feed roll 48and the lower applying roll 46 is constantly pushed to one side. Thecement on the lower applying roll 46 which has been supplied thereto bythe feed roll is concentrated in its groove 84 by the action of thescraper 94 in juxtaposition to the roll and the helically convergingrows of ribs on the roll. As the periphery of the roll passes thescraper, the latter, in close relation to the roll, collects arelatively small quantity of cement 96 (Fig. 3) across its width and atits lower side. As the roll rotates, the accumulation of cement 96retained temporarily by the scraper is slowly pushed from both sides tothe central portion opposite the circular groove and thence deposited onthe roll as it rotates. 1nasmuch as the helices on the roll areoppositely inclined and each partof the roll acts upon that cement incontact with it and the scraper in the manner of the operation of anArchimedean screw, the cement is collected from the work-engaging faceof the roll at either side of the groove 84 and is delivered to thegroove along the lower edge portion of the scraper 94. The gate 22 actssimilarly upon the upper applying roll 14 as the scraper 94 does on thelower applying roll 46.

The teeth on the cement-applying rolls have been made in the form ofwedge frusta in order that the rolls may hold the maximum quantity ofcement for their size compatible with a work-engaging surface ofrequisite strength.

Since the edge of the work, to be thorough- 1y coated, must passcentrally of the grooves, the width of the band of cement applied to thework is predetermined by the width of the roll to the left of the grooveand the width of the groove. In order that cement may be applied tomargins of the work in bands of various widths without requiring thechange of an entire roll, the roll is made in sections which are partedat the groove, so that a roll of the desired width may be substitutedfor the left-hand segmentwhenever a change in quired. The right-handsegment is made relatively wide in order that the scraper in cooperationwith it will collect a quantity of cement therefrom sufliciently largeto insure the groove being Well filled.

As Fig. 5 indicates, the annuli of cement 96 about the rolls merge atthe point of tangency of the rolls to the work and the cohesive tendencyof the cement is adequate to provide an accumulation of cement 98completely filling the space, rectangular in section, bounded by thesides and bases of the grooves 84 and extending along a relatively longportion of the edge of the work.

A wiper member 100 is pivotally mounted on the frame at 102 and of itsown weight bears on the margin of the work at 104 to hold it against theupper end wall 106 of the tank 44, thereby to spread the coating ofcement more evenly over the margin of the work as it passes between thewiper and the wall of the tank, and to return the excess of lriementcollected therefrom back to the tan A gage member 108 is held adjustably fixed to the upper part of the gear box by means of a screw 110.The work-engagin portion of the gage is V-shaped and is chamfired towardits outer face to lessen the possibility of its frayin the edge of thework as it passes to the rol s in contact with the gage. The fasteningscrew 110 passes through the gage in an elongated slot 112 which allowsthe gage to be moved longitudinally in order that the apex of itsguiding surface may be alined with the grooves 84 in the rolls.

Having thus described the invention, what is claimed as new and desiredto be secured by Letters Patent of the United States is:

1. In a cementing machine, a cement-applying roll having acircumferential cementretaining groove therein, and helical rows ofspaced teeth forming coacting helical grooves oneither side of saidgroove and communieating therewith.

2. In a cementing machine, a cement-applying roll having oppositelyinclined helical rows of spaced teeth, and a cement-retaining grooveseparating the rows of one inclination from those of the other.

3. In a cementing machine, a cement-applying roll having oppositelyinclined helical rows of spaced teeth, and a cement-retaining surfaceseparating the rows of one inclination from those of the other.

4. In a. cementing machine, a cement-applying roll having oppositelyinclined helical rows of spaced teeth. and a cement-retaining surfacenormal to the axis of the roll and separating the rows of oneinclination from those of the other.

5. In a cementing machine, a cement-applying roll having a plurality ofcement-rethe Width of the cemented margin is retaining grooves andprovided with an intermediate groove of substantially greater depth thanthe other grooves, means for holding a piece of work in engagement withsaid roll as it is fed through the machine, and means for accumulatingan excess of cement in said deeper groove to form an annulus of cementof restricted width extending around said intermediate part of saidroll.

6. In a cementing machine, cooperating applying rolls having groovedperipheries, each of said rolls being provided with a plurality ofgrooves one of which is deeper than the others, said deeper groovesbeing 1n alinement with one another, and means for supplying cement tosaid rolls constructed and arranged to accumulate an excess of cement insaid deeper grooves, whereby a piece of work fed through the machinewith its edge in alinement with said deeper grooves will'be coated notonly upon its opposite margins but upon its edge surface as well.

7. In a cementing machine, a cement-applying roll having its peripherystudded with oppositely. inclined helically disposed rows of teeth ofthe form of wedge frusta, the surface of said roll having a grooveseparating the rows of one inclination from those of the other, wherebyto retain an accumulation of cement gathered from both' sides of thegroove.

8. In a cementing machine, in combination, a cement-applying roll, meansfor supplying cement thereto, a scraper adjacent to the roll, andoppositely acting means upon the periphery of said roll cooperating Withsaid scraper as the roll is rotated to assist in accumulating the cementupon the roll in a band of restricted width about said roll.

9. In a cementing machine, in combination, a cement-applying roll, meansfor supplying cement thereto, a scraper. adjacent to the roll, andoppositely inclined converging rows of work-engaging teeth constructedand arranged to assist in guiding cement collected by the scraper towarda port-ion 0f the periphery of the roll between its opposite edges.

10. In a cementing machine, in combination, a tank for cement, a groovedapplying roll and a toothed feed roll in juxtaposition thereto androtatable in said tank, the teeth of said feed roll being obliquelydisposed across its periphery whereby an accumulated excess of cementheld between the rolls may be forced laterally across their periphery tofill the groove.

11. In a cementing machine, in combination, cooperating applying rollseach having a plurality of grooves in its periphery, one of said groovesin each roll being deeper than the others, and a feed roll injuxtaposition to one of said rolls and having teeth obliquely disposedacross its periphery constructed and arranged to fill the deeper grooveof said latter roll by forcing an excess of cement obliquely across itsface and into said deeper groove.

12. In a cementing machine, in combination, cooperating applying rollshaving grooved peripheries, one of said grooves in each roll beingdeeper than the others, said Administratrim of the Estate of John W.

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